查询词典 covariance

When the Hamming distance was uncertain of its decision due to the influence of eyelids, eyelashes and iris deformations, mean and variance were extracted from coefficients of multiwavelets transform, and Euclidean distance of covariance reciprocal with weight value was designed as the classifier.

对因为睫毛、眼睑、虹膜变形等影响而不能有效识别的虹膜图像，再对多小波变换系数提取均值和方差作为全局特征，用方差倒数加权欧氏距离进行识别。

This paper studies the application of smart antennas to the downlink in the FDD-CDMA. We estimate thedownlink channel covariance matrix and the relative interference to users of the other cells by using the uplink data., and present a method for downlink beamforming , i. e., we obtain the minimum relative interference to other users while the constanttransmitting power is guaranteed.

本文研究了智能天线在FDD-CDMA中的下行链路的应用，利用上行链路接收数据，估计了下行链路的信道相关矩阵和对其它小区用户的相对干扰总量，给出下行链路的波束形成方法，即在保证一定的有效发送功率的同时，使得对其他小区的用户干扰最小。

We choose an optimal model for functional mapping via comparing various combinations of submodels for mean vectors of QTL genotypes and residual covariance matrix according to statistical power of detecting QTL.

根据QTL的统计检测效率，通过比较关于QTL基因型的期望均值向量和剩余误差的协方差矩阵的子模型的不同组合，来筛选优化的功能定位模型。

Modeling time-dependent expected mean vectors of QTL genotypes and the structure of the within-subject residual covariance matrix are the essence for functional mapping QTL of dynamic traits.

拟合与时间相关的QTL基因型的期望均值向量和剩余误差的协方差矩阵是动态性状功能定位的核心内容。

Besides univariate AR model, this dissertation finally presented our study on a parameter called the local spatiotemporal synchronization index, mainly based on residual covariance matrix of a multivariate autoregressive model.

除了单变数的自回归模型外，在这论文的最后，我们也提出了残余共变异矩阵，系根据多变数的自回归模型所发展出来的一个评估脑电波时空一致性的指标：LSTS（local spatiotemporal synchronization）指标。

A filtered transformation and a stochastic control Lyapunov design method are applied to Marino-Tomei systems driven by Wiener noises of unknown covariance. A parameter adaptive law and a control law are obtained to ensure that the closed-up systems are noise-to-state stable and the tracking error can converge to a small residual set around the origin in the sense of mean quartic value in average.

通过滤波变换，采用随机控制Lyapunov设计方法，对于受方差未知的Wiener噪声干扰的Marino-Tomei非线性系统，给出了参数自适应律和控制律，使得闭环系统成为噪声--状态稳定的，并且跟踪误差的4次均方值在时间平均意义下收敛到一个足够小的区域内。

Through the retroversion observing and research of 305 chronic obstructive pulmonary disease inpatients and the covariance analysis, the result indicates: Clinical familiar case types were deficiency of both the spleen and lung , deficiency of both the lung and kidney, and deficiency of all the three.

我们通过对305例慢性阻塞性肺疾病住院病人的分型、临床症状、体征及理化检查指标的观察，认为慢性阻塞性肺系病证以本虚为主要表现，急性发作期挟实，以本虚标实为主。

Through the retroversion observing and research of 305 Pulmonary Systerm disease inpatients and the covariance analysis, the result indicates: Clinical familiar case types were Deficiency of both the spleen and lung , Deficiency of both the lung and kidney, and Deficiency of all the three.

我们通过对305例肺系疾病住院病人的分型、临床症状、体征及理化检查指标的观察，认为慢性肺系病证以本虚为主要表现，急性发作期挟实，以本虚标实为主。

The error is described by weighted average variance-covariance of root mean square error in curve normal direction, and error in the direction with maximum error respectively.

曲线上任意点的误差由端点及距离误差传播导出的误差之加权平均值的协方差表示。

Nevertheless, in many practical applications such as in low sample support or when the signal statistics are rapidly time-varying, we may not have enough sample to form the sample covariance matrix.

然而，常规的子空间估计方法由于涉及到阵列协方差矩阵的估计及其特征值分解，从而需要较高的计算复杂度。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。